Data detection and receiver circuit

Abstract

A method includes a first step of receiving a signal at a first receiver circuit on the basis of a mobile communications standard supporting multiple predefined modulation alphabets wherein the received signal includes first data dedicated to the first receiver circuit and second data dedicated to a second, different receiver circuit, a second step of determining a modulation alphabet of the multiple predefined modulation alphabets during an operation of the first receiver circuit and a third step of detecting data depending on the second data at the first receiver circuit on the basis of the determined modulation alphabet.

What is claimed is: 
     
       1. A method, comprising:
 receiving a signal at a first receiver circuit on the basis of a mobile communications standard supporting multiple predefined modulation alphabets, wherein the received signal comprises first data transmitted by a transmitter to the first receiver circuit and second data transmitted by a transmitter to a second, different receiver circuit, and wherein the second data interferes with the first data; 
 determining a modulation alphabet of the multiple predefined modulation alphabets during an operation of the first receiver circuit; and 
 detecting the second data at the first receiver circuit on the basis of the determined modulation alphabet. 
 
     
     
       2. The method of  claim 1 , further comprising:
 mitigating an interference based on the second data at the first receiver circuit on the basis of the determined modulation alphabet. 
 
     
     
       3. The method of  claim 1 , wherein determining the modulation alphabet is based on the received signal. 
     
     
       4. The method of  claim 1 , wherein determining the modulation alphabet is performed periodically. 
     
     
       5. The method of  claim 1 , wherein determining the modulation alphabet is performed for each resource block or a group of resource blocks dedicated to the first receiver circuit. 
     
     
       6. The method of  claim 1 , wherein determining the modulation alphabet comprises:
 determining a set of Euclidean distances between a received data symbol depending on the second data and a set of modulation symbols of the multiple predefined modulation alphabets. 
 
     
     
       7. The method of  claim 6 , wherein the set of modulation symbols comprises all modulation symbols of all multiple predefined modulation alphabets. 
     
     
       8. The method of  claim 6 , wherein determining the Euclidean distance comprises:
 performing a Maximum Likelihood algorithm or a Near Maximum Likelihood algorithm. 
 
     
     
       9. The method of  claim 6 , further comprising:
 determining at least two first minimum Euclidean distances from the set of Euclidean distances wherein each of the at least two first minimum Euclidean distances depends on one of the multiple predefined modulation alphabets, respectively. 
 
     
     
       10. The method of  claim 9 , wherein determining the modulation alphabet comprises:
 performing a bias reduction of the at least two first minimum Euclidean distances. 
 
     
     
       11. The method of  claim 10 , wherein determining the modulation alphabet further comprises:
 determining a second minimum Euclidean distance from the bias reduced Euclidean distances. 
 
     
     
       12. The method of  claim 1 , wherein the received signal is based on multiple subcarriers and the determining of the modulation alphabet is based on a set of scheduled subcarriers. 
     
     
       13. The method of  claim 12 , wherein the determining of the modulation alphabet comprises accumulating or filtering, or both, at least one Euclidean distance over the set of scheduled subcarriers in a subframe. 
     
     
       14. The method of  claim 1 , wherein detecting the data comprises:
 performing a Maximum Likelihood algorithm or a Near Maximum Likelihood algorithm on the received signal. 
 
     
     
       15. The method of  claim 1 , wherein the first data does not comprise information on a modulation alphabet used for encoding or modulating the second data. 
     
     
       16. The method of  claim 1 , wherein the received signal comprises data transmitted from a first radio cell and data transmitted from a second radio cell. 
     
     
       17. The method of  claim 1 , wherein the first data and the second data are transmitted simultaneously on a same time-frequency resource. 
     
     
       18. The method of  claim 1 , wherein the first data and the second data are transmitted simultaneously at a same time and on a same channelization/spreading code. 
     
     
       19. The method of  claim 1 , wherein the received signal is received on the basis of a Multi-User Multiple-Input Multiple-Output technology. 
     
     
       20. The method of  claim 1 , wherein each of the multiple predefined modulation alphabets is configured to encode all value combinations of at least two bits. 
     
     
       21. The method of  claim 1 , wherein the received signal is received in a downlink direction. 
     
     
       22. The method of  claim 1 , wherein the first data and the second data is transmitted by a base station, the first receiver circuit is comprised by a first User Equipment and the second receiver circuit is comprised by a second User Equipment. 
     
     
       23. A method, comprising:
 receiving a signal at a first receiver circuit on the basis of a mobile communications standard supporting multiple predefined modulation alphabets wherein the received signal comprises first data transmitted by a transmitter to the first receiver circuit and second data transmitted by a transmitter to a second, different receiver circuit, and wherein the second data interferes with the first data; and 
 determining a modulation alphabet of the multiple predefined modulation alphabets on the basis of the received signal; and 
 detecting the second data at the first receiver circuit on the basis of the determined modulation alphabet. 
 
     
     
       24. A receiver circuit configured to receive a signal on the basis of a mobile communications standard supporting multiple predefined modulation alphabets wherein the received signal comprises first data transmitted by a transmitter to the receiver circuit and second data transmitted by a transmitter to another, different receiver circuit, and wherein the second data interferes with the first data, the receiver circuit comprising:
 a first unit configured to determine a modulation alphabet of the multiple predefined modulation alphabets during an operation of the receiver circuit; and 
 a second unit configured to detect the second data at the receiver circuit on the basis of the determined modulation alphabet from the first unit.